CVE-2021-29081

Certain NETGEAR devices are affected by a stack-based buffer overflow by an unauthenticated attacker. This affects RBW30 before 2.6.2.2, RBK852 before 3.2.17.12, RBK853 before 3.2.17.12, RBK854 before 3.2.17.12, RBR850 before 3.2.17.12, RBS850 before 3.2.17.12, RBK752 before 3.2.17.12, RBK753 before 3.2.17.12, RBK753S before 3.2.17.12, RBK754 before 3.2.17.12, RBR750 before 3.2.17.12, and RBS750 before 3.2.17.12.

Published: 2021-03-23 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2021-29081 is rated Moderate Risk (45.8/100): CVSS High severity, with low exploitation likelihood (EPSS 0.43%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2021-29081

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.28% 0.43% +0.15%
2 2026-01-20 0.14% 0.28% +0.14%
3 2025-03-30 — 0.14% —

Full EPSS history (10 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2021-29081

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.4 3.1 HIGH
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.7 6.0 [email protected]
8.4 3.1 HIGH
CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.7 6.0 [email protected]
5.8 2.0 MEDIUM
AV:A/AC:L/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:A)
Requires access to an adjacent network segment.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 6.5 6.4 [email protected]

Weakness enumeration for CVE-2021-29081

Affected software / configurations for CVE-2021-29081

Vendor Product Version Raw CPE
netgear rbw30_firmware < 2.6.2.2 cpe:2.3:o:netgear:rbw30_firmware:*:*:*:*:*:*:*:*
netgear rbk852_firmware < 3.2.17.12 cpe:2.3:o:netgear:rbk852_firmware:*:*:*:*:*:*:*:*
netgear rbk853_firmware < 3.2.17.12 cpe:2.3:o:netgear:rbk853_firmware:*:*:*:*:*:*:*:*
netgear rbk854_firmware < 3.2.17.12 cpe:2.3:o:netgear:rbk854_firmware:*:*:*:*:*:*:*:*
netgear rbr850_firmware < 3.2.17.12 cpe:2.3:o:netgear:rbr850_firmware:*:*:*:*:*:*:*:*
netgear rbs850_firmware < 3.2.17.12 cpe:2.3:o:netgear:rbs850_firmware:*:*:*:*:*:*:*:*
netgear rbk752_firmware < 3.2.17.12 cpe:2.3:o:netgear:rbk752_firmware:*:*:*:*:*:*:*:*
netgear rbk753_firmware < 3.2.17.12 cpe:2.3:o:netgear:rbk753_firmware:*:*:*:*:*:*:*:*
netgear rbk753s_firmware < 3.2.17.12 cpe:2.3:o:netgear:rbk753s_firmware:*:*:*:*:*:*:*:*
netgear rbk754_firmware < 3.2.17.12 cpe:2.3:o:netgear:rbk754_firmware:*:*:*:*:*:*:*:*
netgear rbr750_firmware < 3.2.17.12 cpe:2.3:o:netgear:rbr750_firmware:*:*:*:*:*:*:*:*
netgear rbs750_firmware < 3.2.17.12 cpe:2.3:o:netgear:rbs750_firmware:*:*:*:*:*:*:*:*

References for CVE-2021-29081

cvelogic Threat Intelligence